1
dunderheaded
1
empty-headed
1
featherheaded
1
fool
1
foolish
1
gormless
1
half-baked
1
half-witted
1
insane
1
lamebrain
1
loony
1
lunatic
1
lunkheaded
1
mad
1
mindless
1
nonintellectual
1
nonsensical
1
preposterous
1
sappy
1
screwball
10 years ago|1.5k views|share |citing 
APASmart Define. (2016). brainy thesaurus. Retrieved September 24, 2026, from https://smartdefine.org/brainy/thesaurus/antonyms
ChicagoSmart Define. 2016. "brainy thesaurus" https://smartdefine.org/brainy/thesaurus/antonyms (accessed September 24, 2026).
HarvardSmart Define 2016, brainy thesaurus, Smart Define, viewed 24 September, 2026, <https://smartdefine.org/brainy/thesaurus/antonyms>.
MLASmart Define. "brainy thesaurus" 24 March 2016. Web. 24 September 2026. <https://smartdefine.org/brainy/thesaurus/antonyms>